Roast Stuffed Shoulder of Lamb with Olive Sauce

My recipe for roast lamb, perfect for a lazy Sunday lunch, is easy and inexpensive, using the tasty shoulder which lends itself to slow roasting. I love this method of cooking lamb, which results in sweet, tender meat, almost falling from the bone. This is not one of your temperamental roasts that has to be brought out and served just so, at the point of perfect pinkness. You can vary the stuffing and accompanying sauce next time you make it, perhaps using mushrooms in the stuffing and cape